Predictable Random Number Generation Vulnerability in RuletkaIo Ethereum Gambling Smart Contract

CVE-2018-17968 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

A gambling smart contract implementation for RuletkaIo, an Ethereum gambling game, generates a random value that is predictable by an external contract call. The developer wrote a random() function that uses a block timestamp and block hash from the Ethereum blockchain. This can be predicted by writing the same random function code in an exploit contract to determine the deadSeat value.

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